Basic trope: An animal has the combined physical appearance of two or more species.
Straight: June has an otter's body with bat wings, a long, pointed tongue and Cute Little Fangs.
Exaggerated: June has an otter's body, the forelegs of a canine, the rear legs of a horse, rabbit ears, a beak, a tongue that's forked and raspy, a rat's tail, a pouch, an udder, gills, tentacles, antennae, four eyes (two of which are on stalks) and the wings of a wasp. She breathes fire and can lay eggs.
Downplayed: June is a hybrid snake, like a "wall python" (woma/ball python); she has traits of both species, but not of anything that's not a snake.
June is from another planet where otterlike creatures have the aforementioned bat-like traits.
Alternatively, June is a commonly-accepted mashup with a long history of use in fiction, such as a gryphon or jackalope.
Also alternatively, June is a mashup that's possible in Real Life, such as a liger or goat/sheep hybrid.
Inverted: June is all-otter on a planet where everyone else is a mix-and-match critter.
Subverted: The wings, tongue and fangs are part of a disguise...
Double Subverted: ...which conceals a much more elaborate chimera.
June contains so many composite, mismatched animal character traits that she looks like a gargled mess (for instance, one leg is a tentacle, one leg is a duck's foot, one leg ends in a hoof and one leg is a human's). Basically like exaggerated, only more random.
Alternatively, everything that's living on this planet is a bizarre hybrid, even the plants and technology.
June's parents are an otter and a bat. She has three other siblings: a normal otter, a normal bat, and a bat with webbed toes, whiskers and a long, thick tail. The bat with otter traits marries a kangaroo, and they have a kangaroo-bat child and an otter child.
June lives in a world where both this trope and normal animals co exist.
Averted: A bat and an otter have kids, but the kid is either a bat or an otter.
The writer was told to make all of the characters composites of at least two animals.